5473a35c4e28fd61c441f2f2134ae3b531205939fc35d0d25821480bff4577ad

General

Target

2024-04-20_ed330dd415a88189a0928bdf4d0724d7_cryptolocker.exe
Size

52KB
MD5

ed330dd415a88189a0928bdf4d0724d7
SHA1

b83cc3df75ac7fd1067239460333db0d7d0b4641
SHA256

5473a35c4e28fd61c441f2f2134ae3b531205939fc35d0d25821480bff4577ad
SHA512

069d742aa9f6d7f9af41e5e86a8d6ad1451ce2433469ba91b67637e4adb323d0bd624728ffea4fc671d8664c77376bbf45be922540c499a557dc0f87bb93ac2b
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YY1J+OTOQ:z6QFElP6n+gKmddpMOtEvwDpj31iQ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1136-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000900000001222c-11.dat	CryptoLocker_rule2
behavioral1/memory/1136-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1096-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1096-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1136-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000900000001222c-11.dat	CryptoLocker_set1
behavioral1/memory/1136-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1096-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1096-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1136-1-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000900000001222c-11.dat	UPX
behavioral1/memory/1136-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1096-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1096-28-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1096	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1136	2024-04-20_ed330dd415a88189a0928bdf4d0724d7_cryptolocker.exe

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/1136-1-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000900000001222c-11.dat	upx
behavioral1/memory/1136-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1096-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1096-28-0x0000000000500000-0x0000000000510000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1136 wrote to memory of 1096	1136	2024-04-20_ed330dd415a88189a0928bdf4d0724d7_cryptolocker.exe	28
PID 1136 wrote to memory of 1096	1136	2024-04-20_ed330dd415a88189a0928bdf4d0724d7_cryptolocker.exe	28
PID 1136 wrote to memory of 1096	1136	2024-04-20_ed330dd415a88189a0928bdf4d0724d7_cryptolocker.exe	28
PID 1136 wrote to memory of 1096	1136	2024-04-20_ed330dd415a88189a0928bdf4d0724d7_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-20_ed330dd415a88189a0928bdf4d0724d7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-20_ed330dd415a88189a0928bdf4d0724d7_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1136
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1096

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
52KB

MD5
d933536bfc05307ff953fde7ee42cb1e

SHA1
1a02c2faa9876dd789cd16d4ba7d55afe8abfa59

SHA256
be195c8669299a709750384b50baaa039a55b8b79640c5d8103a3ddc19d83caf

SHA512
92c073af42660781bed079f62a09e514c14831e7a7fd01a2bef6247c4ef2ba75466d46044e254615cf97de0dff4172b1c62dfafc36f11d68fb74b472eb5e1e4f

Download Submit
memory/1096-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1096-20-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/1096-19-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1096-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1136-1-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1136-0-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1136-2-0x0000000000270000-0x0000000000276000-memory.dmp

Filesize
24KB

Download
memory/1136-3-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1136-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1136-16-0x00000000026C0000-0x00000000026D0000-memory.dmp

Filesize
64KB

Download
memory/1136-27-0x00000000026C0000-0x00000000026D0000-memory.dmp

Filesize
64KB

Download

Analysis

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